No canonical domain on NYTimes.com
I am surprised to find that the NYTimes.com does not provide a canonical domain for its homepage or for its articles (at least, for the small sampling I checked). That is, I get the “exact” same behavior in my browser irrespective of entering http://nytimes.com or http://www.nytimes.com.
There is no shortage of opinion about whether to use a www or no www on your domain. Nearly all agree that your site should respond to both versions.